West Sussex · England
External & façade joints in Haywards Heath, West Sussex
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Haywards Heath and across West Sussex. Fully insured, ARBOMaster approved and guaranteed for a year.
- Weathered mastic that no longer stretches
- Water getting into walls through failed joints
- Failed seals between different materials
External mastic in Haywards Heath, done properly
As ARBOMaster approved applicators, we choose exterior sealants to suit the joint and the surfaces. Some surfaces need a primer before sealing and we use one wherever it does. We’re often asked to deal with brick movement joints where the sealant has split and panel joints letting water in, on façade panels, concrete & block and joints between brick and frames.
Extensions are a common sight on houses around Haywards Heath, and the line where an extension meets the original house is a common leak point. Getting the joint depth right matters as much as the sealant itself.
Every job is covered by a one-year guarantee, wherever you are in West Sussex.
- Where
- Haywards Heath (RH16, RH17)
- Wider area
- West Sussex
- Guarantee
- A year, on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Work for landlords, hotels and businesses
We work for landlords and letting agents as well as householders. Sealant work between tenants keeps a property looking cared for.
Housing providers, facilities teams and property managers book us too in Haywards Heath and across West Sussex. We can quote a run of properties together, and we’re fully insured for the work.
Haywards Heath questions
Is there a guarantee on external mastic in Haywards Heath?
All our work, in Haywards Heath and everywhere else, comes with a 12-month guarantee. We are also fully insured and ARBOMaster approved.
Do you cover Haywards Heath for external mastic?
Yes, Haywards Heath is within the area we cover. We work across London and the South East. Just call 0345 464 0079 or email us with a few details of the job.
Is it OK to fill a movement joint with cement?
No. Rigid materials can’t move with the wall. Where a joint has been mortared, it can often be raked out and sealed properly.
What do you put in the joint?
Products from Arbo and Everbuild, among others, chosen to suit the joint. We explain the product when we quote.
Is there any odour?
Some sealants have a smell while they cure, but it fades. Opening a window helps.
Are you fully insured?
Yes. Full insurance covers our work, and we can confirm the details when we quote.
How long will you be here?
A typical job takes anything from a few hours to several days, depending on the building, including preparation and clearing up. Your quote will say how long we expect yours to take.
How long before the joint can be used?
Different products cure at different speeds, so follow the cure time we give you.
Towns and villages near Haywards Heath
Also in Haywards Heath
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
What happens if it’s left?
Done well, a resealed joint is a neat, straight line that suits the wall. A rushed bead with no backing looks untidy and does not last. Around Haywards Heath, failed sealant lets water into hidden places, such as under the floor, behind a panel or into a wall. Whatever the joint, failed sealant only gets worse.
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why choose Mr Mastic in Haywards Heath
- A sealant colour to suit the surroundings
- We are fully insured
- Neat joints and a tidy finish
- Any old sealant cut out fully, not covered over
Take a look at our cost guide or what customers say.
How the visit works
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. Typically it takes anything from a few hours to several days, depending on the building and we leave things clean and tidy. Parking in a town like Haywards Heath is generally straightforward, but tell us if there’s a driveway or any restrictions, and mention if the work is upstairs, in a flat or high on the outside.
- First we look over the joints with you, agree which to renew and talk through access.
- The old mastic and anything lodged in the joint is removed.
- We clean both faces of the joint and prime them where the product calls for it.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
Before we arrive
- Let us know about parking restrictions
- Tell us about access, such as stairs, a lift or high-level joints
- Let us know if you’ve seen damp or leaks
Get a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we’ll talk you through what we’d do. When it suits you, ring 0345 464 0079 or drop us an email.
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Haywards Heath buildings and the weather
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Ockenden Manor (about 2.1 miles west) nearby, there’s older building stock in the area around Haywards Heath as well as newer homes. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth.
Letting a property close to Haywards Heath station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies. If you live in an older home near Church of the Presentation, an extension built onto an older house moves differently, and the joint between them takes the strain.
Haywards Heath is about 9 miles south-east of Crawley, in West Sussex. Our applicators cover external mastic for homes and businesses in Haywards Heath, as part of our work across West Sussex. 371 places in West Sussex are on our list, large and small. There’s also a page for Crawley, roughly 9 miles from Haywards Heath.
Here we cover the RH16 and RH17 postcode area for external mastic. You will find streets such as Church Road, Market Place and High Street, and we cover them all. Haywards Heath is on the A272 and B2028, so it’s easy for us to get to. If you’re just outside Haywards Heath, we cover Scaynes Hill (2 miles east), Wivelsfield (2 miles south), Wivelsfield Green (3 miles south-east), Ditchling Common (4 miles south) and North Chailey (4 miles south-east). Larger places within reach include Crawley (9 miles north-west), Horsham (11 miles north-west), Burgess Hill (3 miles south-west), East Grinstead (10 miles north-east), Shoreham-by-Sea (14 miles south-west) and Lancing (15 miles south-west). Haywards Heath is among the bigger towns we cover in West Sussex.
Near you in Haywards Heath
We work in homes and buildings around The Heath Tavern, Scrase Valley and Tavistock and Summerhill School. Haywards Heath’s nearest station is Haywards Heath station, about 0.6 miles north-west of the centre. Well-known places in the area include Waterbury Castle (3.8 miles north-east) and St Francis & Hurstwood Park Hospital Museum (0.8 miles north). Green spaces nearby include Ashenground and Bolnore Woods.
Aftercare tips
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Have failed joints looked at early
- Keep water from gutters off the wall
- Keep soil, plants and ivy away from the joints
- Never let anyone fill a movement joint with mortar
Only paint over the joint if we’ve confirmed the sealant can take paint. Many exterior sealants aren’t designed to be painted and spoil the finish.
Gaps, plants or missing sealant in a joint are worth getting looked at. Early work is quicker and leaves a better finish.
Do you need external mastic in Haywards Heath?
Every building moves. Brickwork grows a little over the years, blockwork and concrete shrink, and all of it moves with heat and moisture. All of that ends up in the joint sealant.
It’s worth asking for a quote if you see:
- Hard, crazed mastic that has stopped moving
- Water getting into walls through failed joints
- Movement joints with cracked, split or missing sealant
- Sealant that has lost its bond to the brick or render
For site and facilities teams at buildings such as Warden Park Primary Academy, its movement joints, gutters and trims need looking after like any other building’s.
Comparing quotes
- Are they insured?
- What happens if they find a problem under the old sealant
- Is VAT in the price?
- How the surfaces are prepared before sealing
Honest limits
New sealant can’t fix everything, and we’ll tell you before we start. Sealant will not put right:
- Cracking across the wall rather than at a joint
- Walls that need new movement joints cut into them
- Rising or penetrating damp from elsewhere in the wall
If you are not sure, just call 0345 464 0079 or drop us an email and we will give you a straight answer before booking.
Surfaces we seal
- Render & cladding joints
- Concrete & block
- Copings & trims
- Joints between brick and frames
- Façade panels
- Brickwork movement joints